Backwall Height

Backwall heights: 1080mm - 1300mm

Single or Multiple Pipe openings

Single or multiple pipe openings

Specifiable invert levels

Specifiable pipe invert levels

Maximum pipe size

Maximum pipe size:
750mm

Althon R18 Rectangular Angled Precast Headwalls are for outfalls discharging into ponds, swales, ditches beaches and rivers. Rectangular precast headwalls come with the option of two thicknesses of toe, 300mm and 500mm, each of which is available in three depths. 

Althon manufacture R18 precast headwalls with three different wall profiles to suit the gradient of the bank as follows 1 : 1 slope, 1 : 2 slope and 1 : 3 slope.

All Rectangular Headwalls are cast with the opening in the back wall to suit the size and type of pipe being used at the invert level required.